What Differential is this?

Does anyone recognize this differential? Is it IHC or something else? I can't find any readable stamping and there are no tags. It was orange before I painted it black, if that helps? It is really high geared as 35 MPH is pretty much top speed. The truck is a Hamilton built KB-2 with a 3spd floor shift transmission. Thanks Guys.

BUMP! I can not believe no one has an opinion on this? Not even the "Peanut Gallery" put in their two cents. Any and all comments are welcome boys, let's hear em!

I don't own a small K series nor do I have a parts book for them, but it looks like a stock IHC built and designed rear, what are you looking for, someone to say it's a Eaton?
IHC designed and had built to their design, rear axles up until the late '80's.
The end of the lightline, in the late 60's and early 70's they did use SOME vendor supplied stuff, but not in the early years (other than out of house designed engines until the SD in the light line)
I THINK the IHC designation is RA-1050 but not sure what that will help.

As far as numbers, pull the driveshaft and look at the head of the pinion, it will tell all you need to know (ratio (tooth count) and part number)!

International R-1050 Ratio 4.18-1, 3.72-1, 5.11-1

Thanks guys. I'll pull the driveshaft off and check the gear ratio. Judging by the top speed of the truck (or lack of speed) I'm guessing it will say 5.11. Thanks again.